Frankfurt-roasting machine



June ll, 1929.

F. L.. MORROW FRANKFURT ROASIING MACHINE Filed July 19. 1924 6 Sheets-Sheet l 'orfej L'. Morrow June ll, 1929. MORROW 1,716,653

` FRANKFURT RoAsTING MACHINE Filed July 19, 1924 6 sheets-sheet 2 ff A l #5 4:, f JJM@ @M June 11, 1929.

F. L. MORROW FRANKFURT ROASTING MACHINE Filed Ju1y 19, 1924 win/65565,' l

6 Sheets-Sheet 3 df/20672 far' l rz" L. Marrow Jne 11, 1929- F. l.. MoRRow FRANKFURT ROASTING MACHINE Filed July 19, 1924 6 Sheets-Sheet 4 June 11, 1929. F L, MQRROW 15116553 FRANKFURT RosTING MACHINE Filed July 19, 1924y e sheets-'sheet 5 Forresl. MOT/"auf Jue 11, 1929.

F. L. MORROW FRANKFURT ROASTING MACHINE Filed July 19. 1924 6 Sheets-Sheet 6 Y Zavemo'f 7 ZL @fram Patented June 1l, 1929.

UNITED STATES PATENT OFFICE.

FORREST L. MORROW, OF- CHICAGO, ILLINOIS, ASSIGNOR TO FOOD DISILAY `llrIACHINII]` CORPORATION, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

FRANKFURT-mamme MACHINE.

Application' filed July 19,

This invention relates to improvements in roasting machines, more particularly to an Fig. 3 is a horizontal( section on line 3 8 of Figi; i l

Fig.` 4 is a horizontal detail section 4through one of the radiatorv elements on line Harige; f

Fig. 5 is a vertical section on line 5-5 of Fig, 4;

. Fig. 6 is a horizontal section on line 6-6 of Fig. 1; A' y. Fig. 7 is a fragmentary vertical section on -linc 7--7 of Fig. 6; v

Fig. 8 is a horizontal section through the upperv roasting or broiling compartment. "just below the heater unit carrying drum, showing an alternative form of turntable;

Fig. 9 is a vertical section through the carrier revolving and supporting turntable shown in Fig. 8, taken on line 9-9 of Fig/8;

Fie' 10 is a perspective view of an alternatie form of. carrier element; vl A Fig. 11 is a top plan view partiallyV in section of an alternative embodiment of the iiivcntion;

Fig. 12 is a front elevational view of one of the heaters of the embodiment. shoyyn lin Fig. 11; and f Fig. 13 is a detail section on line 13-13 pf Fig. 12.

The device 'comprises a frame- 5 closed below at 6 and havingiabove the closed lower portion 6 a roasting compartment 7. The

`frame 5 has lfour langle bar corner posts 8, the lower ends of .which form supporting feet for supporting the device preferably with 'theclosed bottointhereof spacedv above the floor or other supporting' surface as shown.y The sidesyil. of the closed bottom compartment 6 may be of sheet lmetal or other suitable material attached along their edges-to the posts Sand bottom rails 10.

Qverlying the uppenedges of thesides 1924. seria1No.726,9es. i

9 andforni-ng in` eHect the bottom of theA upper compartment 7 *is a shelf 12 suitably secured to the frame of the device and provided with a relatively large central opening 14. The top of the upper roasting compartment 7 is closed by a roof 15 having sloping sides 16 and a fiat top 17. y l

The bottom compartment 6 has an access door 20 covering one side and hinged at 21 and within the compartment 6 and spaced above the bottom thereof is a shelf 22 attached through brackets 23 to the Acorner posts or other parts of the frame of the device. Supported above the shelfv22 on brackets '25 carried by the frame of the device are cross members 26, the purpose of which will hereafter appear.

T'ie driving mechanism for the frankfurt carrier'- is mounted Within the Lower closed compartment upon shelf 22 and includes a driving` motor 28. On the motor shaft is a driving 'pinion' 29 kwhich meshes with and drives a relatively large spur gear freely Journaled' sit/32 between an upright bearing member'1313` and a horizontal arm 80. Gear ."30 carries arelatively small pinion 34 for rotation therewith and this pinion 34 meshes with a relatively large spur gear 35. Gear 35 1s freely journaled through a shaft or spindle 36between an upright 33 and an arm81 and on its inner end carries a relatherewith.

Bevel pinion 38 meshes with and drives a lrelatively large bevel driving gear 40 fixed upon the main rupright turntable driving shaftJ 42 'of the machine. The disposition of driving motor'28 off to one corner of shelf -12` and the drivingconnections described' provides a relativelygreat gear reduction betweenrthe motor shaft and the main .up-

right shaft 42.1 The lower ends ofv the uprights 33 may be turned out at' right angles and attachedto shelf 22 while the upper ends bottomed cylinder having its lower end tercarry a frame 45 fixed thereon for rotation with theshaft. The frame 45 has windows 46 through which suitable advertising or other matter may be displayed, or the windows may be simply colored or otherwise decorated so that by arranging an electric lamp within the frame 45 an additional attraction will be produced.

l/Vhile l have not shown an electric lamp within the frame 45 it is to Vbe understood that such a lamp may be and is preferably employed. While it may of course be controlled separately, it is preferably connected into the circuit in which the electric lamp 48 is connected and this circuit is controlled by a suitable snap switch 50 on one of the sides 9 of the closed bottom. The circuit through motor 28 may be conveniently controlled by an adjacent switch 52.

Fixed upon the shaft 42 through an underlying hub 54, spacer 55 and spline or key 56 (Fig. 2) for rotation with the shaft 42 are a pair of vertically spaced discs 58 which discs constitute the revolvable turntable of the device. The lamp 48 is carried by a cross rail 61 which `extends acrossand is secured at its opposite ends to the upperrails 62 at the base of the roof 15. Supported also by this cross member 61 and depending therefrom are a pair ofdepending brackets 64 the lower ends of which carry a depending radiator or heater unit carrying drum 65 which maybe in the form of an open minating adjacent and spaced vertically from the turntable and having a central opening 66 in its top wall 67. Mounted on the external surface of the frame or cylinder 65 are the radiator units, heaters or glowers 68 which direct radiant heat upon the frankfurts or other articles being cooked.

Each radiator or glower 68 comprises a hollow body of suitable heat refractory material having suitable openings or inlets 70 in its rear wall for the admission of air for i supporting combustion of the gas which lis fed or supplied to the heater units as will be pointed out. The front walls of the heaters 68 have opening 72 through `iivhich the radiant heat -is directed upon the frankfurts or. other articles on the carriers. protuberances or lugs 73 break up the gas supplied to the heaters, cause thor gh admixture with the air and upon being cated serve to heat the combustible mixture and to maintain the ignited conditionthereof.

Encircling the free lower end of drum 65 are a pair of semi-circular gas supply pipes or conduits 82 and 83 joined by a T coupling 84 and each closed at its opposite free end at 85 and 86 respectively. The gas or other fuel is supplied to the conduits 82 and 83 by means of an upright pipe or conduit 86 which extends vertically through an opening 87 in top 17 down axially through the Integral upper compartment 17 and through the drum 65 along shaft 42 and is connected at its lower end through an elbow 88 with a horizontal tube or conduit 89 which extends radially through the lower edge of the side of drum 65 and is connected to T 84 in communication with the interior thereof.

Spaced circumferentially about each supply section 82 and 83 are openings 90 through the upper walls thereof and screw threaded at their lower endsiinto these Vopenings 90 are upright tubes 91 having enlarged upper ends 92 in which are mounted grates 93 of refractory or other suitable material as shown in Fig. 5. The lower ends of heater units or glowers' 68' are open and fit down over tubes 91 in open communication with the upper. ends thereof and the lower ends of the heater unit rest upon and are supported by supply sections 82 and 83. The upper ends of units 68 are held firmly against the circular depending wall of drum 65 by brackets 95 secured thereto as shown in Fig. 2. The T 84 has a valve 96 which may be manipulated by a handle 97 to establish a vflow of fuel into either section 82 or 83 sepa- I through elbow 88, conduit 89 and into the T and valve chamber 84. .When the valve is need not be combined with the T 84 but may be otherwise arranged, the combination described illustrating one manner of carrying out the inventiom a The heater elements are adapted to be rendered incandescent by the gas ames entering their bases or lower ends, and direct radiant heat' directly upon vthe frankfurts with the effect of broiling or toasting.

The frankfurts`98 or other articles are supported in upright position circularly about,

the circularly arranged heater units 68 by carriers 99; vEach carrier 99 has a post 100 which projects through theopening 14 in* -hold the frankfurt in place and at the same andere cess of the heat to the entire surfaces of the y frankfurt l preferably arrange the carriers 99 alternately at different levels vertically distanced substantially the length of a frankfurt by forming the carriers of alternatelyA greater and lesser lengths as shown in Fig. 2. 'lhis permits close grouping of the frankfurts about the heater without in anyv way interfering with Athe free access of the f heat to all sides thereof. To subject all sides of the frankfurts to the'heat uniformly in their rotation with the turntable about the heater l'provide for turning or revolving each carrier about its own axis with the rotation of the turntable. rlzojthis end the post 100 of cach carrier 99 has just above the shelfr12 a plurality of radially projecting pins 0r fingers 105 as shown in F ig.'2 and in connection with the alternative form of turntable in Fig. 8. Arranged in thev path of radial fingers 105 is the upstanding end 106 of a stationary bracket 107 suitably secured to the shelf 12. 1n the rotation ofT the carriers about the heaters or glowers the bracket finger 106 engages the pins or fingers 105 and turns the carriers about their ow'n axes withtheir rotation with the turntable about the glowers. A uniform roasting or cooking of the frankfurts is thereby produced. By the term roasting used herein l Ymean the broiling or'toasting of the frankfurts which is produced by their direct exposure to the heat in theirv movement about the glowers asl distinguished from strictly roasting'schemes i which walls or partitions are'interposed between the heater. and the articles to be cooked. By avoiding piercing. of the frankfurtsthe lmoisture content is retained in the jackets and thecooking is improved, the jackets bleing left to be `broken open by the cooking vaction when they are done, `or they-may of course be removed at any time before then when itis not desired Vthat they be that well done.

To provide additional moisture in the vcooking of the frankfurts I provide a cup or receptaclel 108 which may be suitably mounted upon shelf 12 and filled with water for evaporation into the fcooking compartment 7 by the heater.- An effective meistening of the air'in compartment 7 is thereby produced.

tractive displayy device is provided. The

doors 110 of course have suitableA catches (not shown) for retaining them closed.

While l have referred to a hinged door at each' side of coinpartment 7, it is, of course, to be understood that only one or any number of said sides may be adapted for opening By providinga hinged door at each side convenient access to any desired frankfurt is permitted. While the roof 15 is preferably closed as by making its sides of sheet metal, it is to be understood that the sides of saidl roof may have suitable transparent or attractive panes if desired. @pposite sides of the device have handles 120 by means of whichrit may be transported or moved from placefto place, and' itis tO be understoodl that the lower ends of corner post 8 may be provided with suitable casters. 'lhe lower ends of posts 100 of carriers 99 engage a ring 122 suitably secured in the frame 123 of the turntable and this ring thereby forms a support for thecarriers, j,

the posts of which would otherwise slip through the registering apertures in discs 58.

The alternativeform of turntable rshown in Figures 8 and -9 is mounted above the shelf 12 vinstead of below the shelf 12 as in Figures 1', 2 and 3. It comprises an octaglpreferably lbe-.mounted inthe lower part of the bottom. compartment and could be supvsupplies the heater units 68.

-- .The alternative form offrankfurt carrier shown in Fig. 10 comprises a thin walled tube 130 the lower portion lof\which forms the *mountingv post which may be provided with suitable projecting pins or fingers such as thoseshown at- 105 inv Fig. 2 for turning the carrier about its own axis. end .ofthe tubular post is provided with three in the present instance, although more or less may be employed, longitudinal slits 132 which divide the upper end of the carrier into three relatively narrow arcuate ends -134,/these ends 134 arerolled out or spread as by means of a die or other suitable tools and-form .prongs for receiving the frankfurt in vertical upriglitpositionA between them. The upper` endsf the prongs 134 maybe turned out slightly at 135 to avoid in- .jury to the frankfurt in placing it in and removing it from the carrier. The prongs 13% thus produced are relatively narrow and 'fplied`with fuel from the conduitl 86 which v' The upper iso offer but little interference to access of the heat to the entire surface of the frankfurts and the carrier thus produced is sturdy, relatively inexpensive and easily formed.V In the other form of carrier the wire prongs may be formed separately from and suitably attached to the post or they may be formed or twisted together to form the post as `an integral part thereof. lhile a tube of circular cross section is admirably adapted for forniing the carrier shown in Fig. 10,

it is lo be understood, of course, that a tube of any other desired cross section may be employed.

ln the embodiment of the invention shown in Fi 11, 12 and 13, the frankfurts or other articles are revolved between a pair of heaters 15() and 152 mounted internally upon opposite sides 153 of the machine. Each heater 15() and 152 comprises a plurality of vertical mounted heater elements 154 formed of suitable heat refractory material and each having a plurality of vertically arranged inwardly discharging openings or outlets 156.

The lower ends of hollow elements 154 are open and these open ends open over openings 160 in supply tubes 161, one of which is ary wise suitably mounting them upon shelf 12;

and a sheet metal cover 168 may enclose each tube and-be provided with openings for receiving the lower ends of the heaters 150 and 152 and holding them in proper position over the openings 160 or the open lower ends of the respective heaters may be otherwise held properly positioned over theopenings 160.

rlhe fuel is supplied to tubes 161 from a pair of hose or other suitable supply conduits 169, one for each tube 161. Ineach supply line is an air valve 170 of any suitable or preferred type for admitting air to support combustion of the fuel andregulating the proportioning of air to fuel as well understood in the art. Also in each upply .line is a valve 171 by means of which either fuel line and thereby either heater may be turned or shut off independently of the other, or they may be turned on or shut off together. The mixture passages or conduits 172 from the valves 168 to the tubes 161 may iiare slightly as shown and each opens at its inner end into its respective tube 161.

The frankfurts are supported in upright endwise position by carriers 99 eircularly spaced about the turn table 175 for rotation therewith and suitable knock over means agresse bodiments for turning the carriers 99 about their own axes as they rotate with the turntable between the heaters 150 and 152. Uniform roasing of all sides is thus assured and by turning ofi one heater for example, the speed ofthe roasting operation may be varied. As before, the topy of the upper roasting compartment is again closed by a sloping roof 180 having a flat top 182.

I do not intend. to limit the invention to the particular details shown and described. lI claim 1. In a device of the class described, a casing having a closed lower compartment,

and an upper compartment having its interior open to view, a heater in the upper compartment, a driving motor in the lower compartment, a drive shaft having driving connection with said motor within said lower compartment and extending generally vertically, av turn table mounted upon said drive shaft for rotation therewith, carrers mounted upon said turn table and rotatable in said upper compartment, and means for turning said carriers upon their own axes in their movement with the turn table, said last means comprising knockover means on the carriers and means mounted in the path of movement of said knockover means and cooperable therewith to turn the carriers in their movement with the turn table.

2.111 a machine of the class described, a vertical drive shaft, a turntable on said shaft, a drum suspended above the turntable, heater means on said drum, carriers mounted on said turntable for rotation about said heater means, the drive shaft extending vertically through the drum and a fuel supply conduit extending vertically through the drum and adapted for supplying said heater means.

3. In a machine of the class described, the combination of a casing having `a lower closed compartment, and an upper cooking compartment having a roof, the upper compartment having transparent panes for eX- posing its interior to view, a heater in said upper compartment, a plurality of carriers for supporting frankfurts individually in upright position about said heater, drive means in the lower compartment for revolving theccarriers in the upper compartment about said heater, said drive means including. a drive shaft extending vertically through the roof and a-conduit entering through the roof and extending down within the path of movement of the carriers for supplying fuel to the heater means.

4. ln a machine of the/@lass described, the combination of a casing having a lower closed compartment, and an upper cooking compartment having a roof, the upper compartment having transparent panes for eX- posing its interior to view, a heater in said upper compartment, a plurality of carriers miente for l supporting rankfurts individually in upright position about said heater, means in the lower compartment for revolvingA the carriers inthe upper compartment about said heater, said drive means including a motor and a drive shaft extending verticallythrough the roof, a conduit entering through the roof and ext-ending down within the path of movement of the carrier for supplying fuel to the heater means, an in- `candeseent lamp in the upper compartment,. and switch means on the side of the Ycasing for controlling the drive motor and the lamp circuit.

5. lin a device of the class described, a turntable, a drum suspended thereover, heater means on saidk drum, means for turning the turntable from below, a plurality of carriers mounted on `the turntable and rotatable about said heater means, and fuel supply means for said heater means com- -prising a pair of conduits about the bottom of. the drum, a conduit` extending Ldownwardly through the drum and having connection with each of said conduits and valve means for establishing a supply of fuel from said last conduit to either ot said first conduits separately vor to both said first con-v duits together.

6. ln a machine of the class described, a `vertical drive shaft, a turntable on said shaft, a drum suspended above the turntable, heater means on said drum and carriers mounted on said turntableI for rotation about said heater means.

7. ln a device of the class described, a

turntable, a drum suspended thereover,

heater means on said drum, means for turning the turntable from'below, a plurality of carriers mounted' on the turntable and rotatable about said heater means, and fuel sup- `ply means for said heater means comprisconduit about the bottom of the drum, said conduit having circumferentially spaced upwardly opening outlets, and the heater means comprising heater elements opening over said outlets and lying on the drum.

9. In af device of the class described, a turntable, a drum suspended thereover, heater vmeans on said drum, means for turnging the turntable from below, a lurality of carriers mounted on the turnta le and rotatable about said heat-er means, and fuel supply means for said heater means coinl plane O,

prising a conduit about thebottom of the drum, said vconduit having circumferentially spacedupwardly opening outlets, and the heater means comprising heater elements opening over said outlet and lying on the drum, said heater elements ad-apted to be renderedincandescent by gas `flames entering their bases.y

10. lin a device wof the class described, a.

casing having upper and lower compartments, a heater in the upper compartment, a turn table mounted for rotation, means in the lower compartment for imparting rotary movement to the turntable, said turntable comprising discs having registering apertures, a support underlying said apertures,

and carriers having mounting posts entering said apertures and 'having endvvise supporting engagement with said underlying support.

11. in a device of the class described, a casing, having upper and lower compartments, a` heater in the uppercompartment,

a turn table mounted for rotation, meansk in the lower compartment for imparting rotary movement to the turntable, said turntable comprising discs having registering i apertures, a support underlying said aper-4 tures, and carriershaving mounting posts entering said apertures and "having endwise 'supporting engagement with said underly ingpsupport, said carriers having rongs at their upper ends for supporting rankfurts in upri ht position in substantially the the heater.

12. ln a device of the class described., the combination with a heater and turntable mounted for rotation of a plurality of carriers mounted alternately at different levels upon said turntable and rotatable therewith in the plane of the heater.`

13. In a device of the'class described, lthe combination with. a heater and turntable mounted for rotation of a plurality of carr- -riers mounted-alternately at different levels upon said turntable and rotatable therewith in the plane of the heater, and knockover means in the path of movement of the carriers with the turntable for turning said carriers on theirown axes. i l

14. In a device of the class described, the

combination of a vertical drive shaft, a turntable mounted on said shaft for rotation therewith, said turntable comprising discs having registering apertures to'receive carriers for rotation with the turntable, and means below the discs for receiving and supporting the lowerends of the carriers.

15. ln a device of the class described, the combination ofa heater, a turntable below said heater and projecting outwardly therefrom, a plurality of carriers individually` mounted inv circumferentially spaced'apertures in the outwardly projecting portion ot the turntable,`I means below said apertures for receiving and supporting said carriers,

said turntable comprising a pair of discs having registering apertures circumferentially about the projecting portion of the turntable, a plurality of carriers having mountingposts mounted in said apertures and having their upper ends formed to support rankfurts in upright position, and means below said apertures for receiving and supporting said carriers.

16. In a device of the class described, the combination of a heater, a turntable VIbelow saidl heater and projecting outwardly therefrom, a plurality of carriers individually mounted in circumferentially spaced apere tures in the outwardly projecting portion of the turntable and means below said apertures for receiving and supporting said carrlers. i

1?. ln a device of the class described, the combination of a heater, aplurality. of carl riers adapted for individually supporting rankfurts on end and in upright position without piercing the same, said carriers being arranged alternately at different levels.

18. In a machine of the class described, the combination of a cas-ing having an upper cooking compartment, a heater in said compartment, a plurality of` carriers for supporting frankfurts individually in upright position rotatably mounted about said heater, and a conduit extending through Said upper compartment for supplying fuel to said heater` means.

ln Witness whereof,I l hereunto subscribe my name this 10th" day of July, 1924.

ronnnsr L. Moniaow. 

